diff --git a/src/org/apollo/game/model/inter/EnterAmountListener.java b/src/org/apollo/game/model/inter/EnterAmountListener.java
index f954062f..01e4b92d 100644
--- a/src/org/apollo/game/model/inter/EnterAmountListener.java
+++ b/src/org/apollo/game/model/inter/EnterAmountListener.java
@@ -5,6 +5,7 @@ package org.apollo.game.model.inter;
  * 
  * @author Graham
  */
+@FunctionalInterface
 public interface EnterAmountListener {
 
 	/**
diff --git a/src/org/apollo/game/model/inter/InterfaceListener.java b/src/org/apollo/game/model/inter/InterfaceListener.java
index 57342348..7e4f21cf 100644
--- a/src/org/apollo/game/model/inter/InterfaceListener.java
+++ b/src/org/apollo/game/model/inter/InterfaceListener.java
@@ -5,6 +5,7 @@ package org.apollo.game.model.inter;
  * 
  * @author Graham
  */
+@FunctionalInterface
 public interface InterfaceListener {
 
 	/**